chrome flash EOL on linux/ubuntu - google-chrome

Question

There are multiple blogs on how to make flash work post EOL for sites or firmware console that have failed to migrate before EOL.
downgrade to google-chrome 87.x
build mms.cfg and put in appropriate google-chrome config directory
To this extent I want to run this patch in a VM (Ubuntu 20.4.1 on VirtualBox 6.1.6) to ensure that my actual machines are unto date and fully patched. However I'm finding patch works on my MacOS host but not in Ubuntu VM. The run once button never appears and flash component in webpage shows download failed
To remove potential for typos - I've coded in python with a YaML config file. Why does this not work in google-chrome on Ubuntu?
chrome.py
import re, shutil, subprocess, yaml, click
from pathlib import Path
import platform
def cmd(cmd:str="ls -al", assertfail=True) :
up = subprocess.Popen(cmd, shell=True, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, close_fds=True)
str = [o.rstrip().decode() for o in up.stdout]
exitcode = up.wait()
if assertfail: assert exitcode == 0, f"[{exitcode}] {cmd} {str}"
return exitcode, str
#click.command()
#click.option("--uninstall", default=False, is_flag=True, help="uninstall google chrome")
def main(uninstall):
click.secho(f"{platform.system()}")
with open(Path.cwd().joinpath("chrome.yaml")) as f: config = yaml.safe_load(f)
if platform.system()=="Linux":
if uninstall:
e, out = cmd("sudo apt-get purge -y google-chrome-stable")
print(out)
cdeb = Path.cwd().joinpath(f"chrome-{config['version']}.deb")
# download required version of chrome if it has not already been downloaded
if not cdeb.exists():
e, out = cmd(f"wget --no-verbose -O {cdeb} http://dl.google.com/linux/chrome/deb/pool/main/g/google-chrome-stable/google-chrome-stable_{config['version']}_amd64.deb")
print(out)
# check wanted version of chrome is installed
e, iv = cmd("google-chrome --version", assertfail=False)
iv = iv[0] if e==0 else "0.0.0.0"
vre = re.compile("[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+")
iv = re.search(vre, iv)[0]
wv = re.search(vre, config["version"])[0]
click.secho(f"installed: {iv} wanted: {wv} same: {iv==wv}",bg="cyan")
if iv!=wv:
e, out = cmd(f"sudo apt install -y {cdeb}")
print(out)
# make sure required locations of adobe config files exist
p2 = Path.home().joinpath(".config/google-chrome/Default/Pepper Data/Shockwave Flash/System/")
elif platform.system()=="Darwin":
p2 = Path.home().joinpath("Library/Application Support/Google/Chrome/Default/Pepper Data/Shockwave Flash/System/")
else:
click.secho(f"unknow operating system {platform.system}")
exit(1)
if not p2.exists():
p2.mkdir(parents=True)
# build adobe flash config file
mmsf = Path.cwd().joinpath("mms.cfg")
with open(mmsf, "w") as f:
for l in config["base"]: f.write(f"{l}\n")
for u in config["urls"]:
for l in [f"{k}={v}{u}\n" for p in config["urlkeys"] for k,v in p.items()]: f.write(l)
# distribute adobe flash config file
shutil.copy(mmsf, p2)
click.secho(str(p2.joinpath("mms.cfg")), bg="blue", bold=True, reverse=True)
with open(p2.joinpath("mms.cfg")) as f:
click.secho(f.read(), bg="blue")
if __name__ == '__main__':
main()
chrome.yaml
base:
- EnableAllowList=1
- EOLUninstallDisable=1
- ErrorReportingEnable=1
# - TraceOutputFileEnable=1
# - PolicyFileLog=1
- AllowListPreview=1
- TraceOutputEcho=1
urls:
- codegeek.net
- ultrasounds.com
- photobox.co.uk
- secure.photobox.com
- serving.photos.photobox.com
urlkeys:
- AllowListUrlPattern: "*://*."
- WhitelistUrlPattern: "*://*."
- AllowListUrlPattern: "*://"
- WhitelistUrlPattern: "*://"
# https://www.ubuntuupdates.org/package/google_chrome/stable/main/base/google-chrome-stable
# 87 - last version with flash bundled
version: 87.0.4280.141-1